Charles



(No Model.)

0.0. YALE. BURGLAR PROOF VAULT.

' N0.'416,'700. Patented Dec. 8, 1889.

WITNESSES: I l/VVE/VTOR ATTORNEY UNITED STATES PATENT OFFICE.

CHARLES O. YALE, OF NEWV YORK, N. Y.

. BURGLAR-PROOF VAULT.

SPECIFICATION forming part of Letters Patent No. 416,700, dated December3, 1889.

Application filed May 25, 1839. Serial No. 312,138. (No model.) I

To all whom it may concern.-

Be it known that 1, CHARLES O. YALE, of the city, county, and State ofNew York, have invented, made, and applied to use certain new and usefulImprovements in Burglar- Proof Vaults, whereof the following is-aspecification, reference being had to the drawing annexed, showing aperspective view of a vault in course of construction.

My improved vault is inclosed by walls, floor, and roof, each in threedivisionsviz., a wall of laid-up interlocking railroad T rails, outsideof this a wall of protected masonry, and inside a wall or lining ofwelded iron and steel.

To enable others skilled in the art to practice my invention, I willproceed to describe the same.

The-vault is begun by first preparinga foundation A, of masonry, and thewall B, of railroad-rails .G, is erected thereon. Thiswall issubstantially like that secured to meby Patent No. 169,938, datedNovember 16, 1875, to which patent I refer for a full description ofthis part or feature. While this wall is in course of construction it isfollowed up with the mason-work wall D on the exterior. Prior to myinvention the latter have been built of brick and mortar, and henceoffer no special impediment to removal for clandestine entrance to thevault.

To provide a barrier for protecting the Wall against attemptedexcavation thereof for access therethrough, I prepare bars E, of weldediron and steel, adapted to lie in and form part of the wall, these barsbeing also carried con tinuously around the corners. The bars arearranged in one or more lines side by side in the mortar and cement, asindicated in the drawing, and are repeated every second or third courseof bricks. I prefer to arrange them in the interior of the masonry D, soas to be quite out of sight and present no indication on the exteriorsurface of their presence. These bars serve to protect the wall againstburglarious operations by sov increasing the difliculty of penetratingthe wall ,as to exhaust the burglars available time for doing his work.The inner surface of the wall B is composed of the bottoms or bases ofthe railroad T-rails. Within this is the wall or lining of welded ironand steel, such as used in the construction of burglar-proof safes. Thislining preferably comprises a number of sheets of welded steel and ironlaid on in courses or layersthat is to say, first a course F of sheetsrunning from top to bottom, and then another series F on that runningaround horizontally. Another series F running vertically, will breakjoints with the first, and so on to any desired number of courses, allwhich are secured to each other and to the wall B in any suitablemanner.

I claim as my invention- 1. The improvement in burglar proof vaults,which consists in introducing a series of strong bars of welded iron orsteel into the mason-work, such bars being arranged side by sidelongitudinally of the wall and built therein as the Wall is laid up.

2. In a burglar-proof vault, the combination of the inner metalliclining and the Outer wall of masonry protected and re-enforced with barsof iron or steel embedded into the mason-work.

3. The combination, in a burglar proof vault, of a wall composed ofinterlocked railroad rails, an outer wall of mason work strengthenedwith bars of iron embedded therein, and an inner wall or lining ofwelded steel and iron.

CHARLES O. YALE.

Witnesses:

JAMES M. TULLY, JOHN W. WATERs.

